// 02 — Building

Things I'm building — and why they matter.

Professionally, this is where my time goes. Each entry says what it is, why it exists, and where it stands.

in progress

TestBrain

what
An AI-powered test generation tool that understands the whole repository.

why
Diff-based testing catches what changed; it misses everything the change touches. TestBrain reads the codebase like a teammate would before writing a single test.

problem

Placeholder — what breaks today because tests only look at the diff?

approach

Placeholder — how TestBrain builds a model of the repo before generating anything.

what I learned

Placeholder — something real you didn't expect while building it.

what's next

Placeholder — the next concrete milestone.

in progress

Multitenant Architecture on Cube.js

what
Designing multitenant systems with Cube.js as the semantic layer between raw data and every product surface that queries it.

why
One source of truth for metrics, clean isolation per tenant — boundaries made explicit instead of implied.

problem

Placeholder — what goes wrong when every product surface queries raw data directly?

approach

Placeholder — how the semantic layer sits between data and surfaces, and where tenant boundaries live.

what I learned

Placeholder — what the seams taught you.

what's next

Placeholder — the next concrete milestone.